Narimani, Ahmad, et al. “RANKING THE SPECTATORS’ DIFFICULTIES IN PURCHASING ELECTRONIC TICKETS OF FOOTBALL PREMIER LEAGUE MATCHES AT AZADI STADIUM, IRAN”. Sportif Bakış: Spor Ve Eğitim Bilimleri Dergisi, vol. 4, no. 1, June 2017, pp. 9-15, https://sportifbakis.com/index.php/pub/article/view/231.